When electromagnetic radiaiton of wavelength `300 nm` falls on the surface of sodium electrons are emitted with a kinetic enegry of `1.68xx10^(5)Jmol^(-)`. What is the minimum enegry needed to remove an electorn from sodium?
Strategy: The minimum enegry required to remove an electron from target metal is called work function `W_(0)` of the metal. It can be calculated from Eq., provided we know the energy of the incident photon and kinetic enegry of a single photoelectorn.

Explanation

To solve the problem, we need to find the minimum energy required to remove an electron from sodium, known as the work function \( W_0 \). We can determine this using the energy of the incident photon and the kinetic energy of the emitted electron.

### Step-by-Step Solution:

1. **Calculate the Kinetic Energy of One Electron:**
The kinetic energy given is for one mole of electrons. To find the kinetic energy for a single electron, we divide the given value by Avogadro's number (\( N_A = 6.022 \times 10^{23} \) mol\(^{-1}\)).

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